Season 1
Tells the story between Leo and his father Li Changhai. Their relationship is tense and they don't understand each other. One day, while drunk, Leo made rude remarks towards an old photo. As a result, the photo started moving around and everyone got knocked down. When they woke up, they found themselves in a school playground in the 1990s – and soon realized that they had returned to Li Changhai's student days.
